期刊论文详细信息
Condensed Matter Physics
Role of attractive forces in determining the equilibrium structure and dynamics of simple liquids
关键词: simple liquids;    equation of state;    perturbation theory;    self-diffusion;   
DOI  :  10.5488/CMP.18.13002
来源: DOAJ
【 摘 要 】

Molecular Dynamics simulations of a Lennard-Jones system with different range of attraction show that the attractive forces modify the radial distribution of the particles. For condensed liquids only, the forces within the the first coordination shell (FCS) are important, but for gases and moderate condensed fluids, even the attractive forces outside the FCS play a role. The changes in the distribution caused by neglecting the attractive forces, lead to a too high pressure. The weak long-range attractions damp the dynamics and the diffusion of the particles in gas-, super critical fluid- and in liquid states. The values of self-diffusion coefficients (SDC) agree qualitatively with a modified Cohen-Turnbull model. The SDC-s along the critical isotherm show no anomaly at the critical point in agreement with experimental data.

【 授权许可】

Unknown   

  文献评价指标  
  下载次数:0次 浏览次数:0次